Paul - I'm rather certain that the roll crimpers are designed to go clockwise. That bad spot may be from you starting the crimper from a dead stop with the crimper against the mouth of the case. You might also look at the condition of the mouth if it's paper hulls you are talking about, here. Perhaps a little heat on the mouth, like holding it against a hot iron and then touching it into a saucer with a melted candle that has hardened into a cookie. The hot hull mouth will absorb just a bit of wax and maybe solve the problem.
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